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(No Model.) 4 Sheets-S'heet 1. J. A. GROEBLI. EMBROIDERING-MAGHINB.

No. 593,206. Patented Nov. 9, 1897.

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(No Model.) 4 Sheets-Sheet 2 J. A. GROEBLI. EMBROIDERING MACHINE.

No. 593,206. Patented Nov. 9, 1897.

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No. 593,206. Patented Nov. 9, 1897.

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J..A. GROEBLI. EMBROIDERING MACHINE.

No. 593 ,206. Patented NOV. 9, 1897.

WI TNESSE-S A TTOBNEYS.

UNITED STATES PATENT @EEibE.

JOSEPH A. GROEBLI, OF NEW YORK, N. Y., ASSIGNOR TO THE KURSIIEEDTMANUFACTURING COMPANY, OF SAME PLACE.

EMBROlDERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 593,206, datedNovember 9, 1897'.

Application filed November 10, 1896. enial llo. 611,586. (No model.)

To aZZ whom zit-may concern:

Be it known that I, JOSEPH A. GROEBLI, a resident of the city, county,and State of New York, have invented certain new and useful Improvementsin and Appertaining to Embroidering-Machines, of which the following isa specification.

My invention relates to improvements in and appertaining to embroideringmechanism, and will be understood by referring to the accompanyingdrawings, forming part hereof, to which reference is hereby made.

In the drawings, Figure 1 is a broken-away elevation of so much of anembroidering-machine as will serve and suffice to illustrate myinvention. Fig. 2 is a side elevation thereof. Fig. 3 is a frontelevation of so much of an embroidering-machine as will serve andsuffice to illustrate another form of my invention. Fig. 4: is abroken-away elevation of the upper portion of the left-hand end of theembroidering-machine and exhibits the spring counterbalancing mechanismand compensating mechanism therefor shown in said Fig. 3. Fig. 5 is abroken-away horizontal section, on an enlarged scale, taken on line 5 ofFig. 4 and showing in detail the shiftable clutch mechanism, as will behereinafter set forth. The direction of thisview is upward, as indicatedby the arrow in Fig. 4. Fig. 6 is an end view of Fig. 4, looking fromthe right of Figi l in the direction of the arrow. Fig. 7 is abrokenaway detail face view of one member of the clutch, the sectionthrough the clutch to enable such a viewto be had being taken throughline 7 7 of Fig. 5, the arrow showing the direction of view; and Fig. 8is a face view of another member of the clutch mechanism, showing alsothe laterally-moving clutching member. The section through the shaft inthis figure is taken on line 8 8 of Fig. 5, the direction of View beingtoward the left of said figure, as indicated by the arrow.

The object of my invention is to provide a mechanism which shall sosupport and balance the fabric-frame of an embroidering-machine that themotion of the said frame shall be the same and in the same directionover all parts of the said frame.

It is well known that as at present constructed embroidery-frames,although mechanism has been provided to balance them, are not properlybalanced and the motion of the portions of the frame remote from thepoint where the pan tograph or the jacquard mechanism is attached arenot the same in direction or extent as the motions of the part of theframe adjacent to the point of attachment of the jacquard mechanism. Bymy invention I obviate these defects, and have produced an absolutelyparallel motion throughout the entire extent of the fabric-frame, bywhich means the figures embroidered upon the fabric at a distance fromthe point of attachment of the jacquard device or pantograph are of thesame size and shape as those near to the said point of attachmentinstead of being, as at present, of difierent sizes and distortedshapes.

To the ends named my invention consists in the construction andarrangement of devices hereinafter set forth and claimed.

In the drawings, A represents the fabricframe of an embroidering-machinewhich may be connected to a pantograph or jacquard mechanism at anysuitable point. tretched upon the fabric-frame is a fabric B, with whichcooperate the usual needle-carrying bars 0 D.

E is the frame of the machine, which frame is shown as provided withbrackets F G for the support of the fabric-frame. Pivoted at the point fon the bracket F of the frame is a lever H, which is shown in thepresent instance as an elbow or bell-crank lever. Pivoted at the point gon the bracket G is a similar lever I. The fabric-frame A is suspendedfrom these two fabric-frame-supporting devices, as follows: Dependingfrom one end h (see Fig. 3) of the lever H and pivoted thereto at thepoint h is a vertical link or suspension bar or rod J, which is pivotedat its lower end to a bracket K on the fabric-frame, and depending fromone end i (see Fig. 3) of the lever I and pivoted thereto at the point iis a vertical link or suspension-bar L, which is pivoted at its lowerend to a bracket M on the fabric-frame. The end 72. of the lever H (seeFig. l) is pivotally connected to a longitudinal connecting link or rodN, which extends to the end (see Fig. 1) of the lever I and is therepivotally connected to the lever I, so that the levers H and I, withtheir con necting-rod N, constitute a parallel motion,

all of whose parts are positively connected together, as by pivots, asshown, so that there will be no lost motion, as in thepresent type ofmachine, wherein the fabric-frame is suspended upon rails carried bybrackets connected to the fabric-frame and resting upon wheels upon thesuspension device. This parallel-motion suspension device may be pro-vby the needles, as is usually the ease, the fig ures will in truth besimilar and not more and more distorted as we proceed along thefabric-frame away from its point of connection with the jacquardmechanism.

It is obvious that the fabric-frame and parallel motion may becounterbalanced otherwise than by a weightas, for instance, by a springor tension mechanism. One form of this spring or tension mechanismcombined with a fabric-frame of the embroidering-machine and theparallel motion is shown in Figs. 3 to S.

In Fig. 3 the supporting and parallelmotion mechanism are shown as inall respects similar to the corresponding elements in Figs. 1 and 2,with the exception, however, that the weight 0 and lever o are dispensedwith and their place supplied by a counterbalancing-spring or tensiondevice comprised in part by springs P P and provided with compensatingmechanism, as will be explained. The construction and connection ofthese springs will clearly appear by reference to Figs. 3, 4i, and (3.In these figures the frame E of the embroidering-machine is shown asprovided at the upper leftshand corner with a journal or pivot socket Q.Swinging freely in this journal or pivot socket Q is a yoke R, which isprovided with a rounded face or portion S, which is seated in thejournal or pivot socket Q and has extending therefrom a bracket T,provided with an extension 7.. The yoke R, bearing or socket Q, roundedportion S, and bracket T are pierced for the passage of a shaft U. Oneend of each of the springs P P is connected to the bracket T and theother ends of the said springs are connected by means ofadjusting-screws v to a cross-head V, (seen clearly in Figs. 4 and 6,)which cross-head is shown as provided with guideways 1). Connected tothe extension 25 of the bracket T and working in guideways 1; of thecross-head V is a T-shaped guide or guide-bar WV, (clearly seen in Figs.

-of Figs. 3 and at is shown as pivoted.

4, 5, and 6,) which guide-bar prevents the cross-head V from rotating ortwisting. The shaft U, which passes through the yoke and its adjunctivedevices, is screw-threaded for a portion of its length and carries uponthe said screw-threaded portion a threaded nut X, to which the lower endh of the lever H The end a of the shaft U is shown in Fig. 4 as seatedin a cup or socket Y which is provided with a concave bearing-face g,which bears upon a small circular bulge 0 carried by the cross-head V.It will thus be seen that as the yoke is held stationary and the end ofthe shaft U bears against the crosshead that motion of the fabric-framewill cause the springs P P to be extended or collapsed, as the casemaybe, and consequently that the device thus constituted will be acounterbalancin g device for the fabric-frame, subservin g the same funetions as the weighted lever shown in Figs. 1 and 2.

For small motions oft-he frame the springs are quite eflicient and servethe purpose with great exactness. It has been observed, however, thatwhen the fabric'frame is given a greater range of movement and thesprings become extended it becomes more and more difficult to extendthem farther, and consequently some compensation must be made, whichcompensation should be proportional to the extent of movement of theframe, so that the resistance to the movement of the frame will notincreaseas the frame is given a greater range of movement, but will atall times be substantially the same. For this purpose I have provided acompensating mechanism for automatically controlling the tension of thecounterbalancing-spring, one form of which compensating mechanism isshown in Figs. 3 to 8, which Iwill now proceed to describe. In thesefigures I have shown a plurality of clutch members a Z). The clutchmember a is provided 'interiorly with a series of teeth a and is mountedupon or made integral with a sleeve a which is carried loosely upon theshaft U. This sleeve a is circum-- ferentially grooved at a for thereception of the edge of a guiding-disk a which is carried upon an arbora and pressed outwardly on the said arbor by a spring a, so that theclutch member a may have a slight longitudinal movement on the shaft Uand will be restored to position by the restoring-sprin g a. The clutchmember I) is similarly provided interiorly with teeth I) and, as in thecase of the clutch member a, is mounted upon or integral with a sleeve bwhich turns freely upon the shaft U and is provided with acircumferential groove b for the reception of a guiding-roller b, whichis carried upon an arbor b fixed in the yoke and pressed outwardly by arestoring-spring b, so that the clutch member I) may have a longitudinalmovement on the shaft U. These clutch members a b are rotated inopposite direc tions by suitable belts or other means con- IIO tinuouslyor periodically. Keyed or otherwise secured upon the shaft U is aclutching disk or member Z, (clearly shown in section in Fig. and inface view in Fig. 8,) which clutching member or disk Z is providedperipherally with projecting teeth 2, which enter between the teeth a,and b of the clutch members a or b, as the case may be, it being notedthat the lever H, when the fabricframe is moved, imparts a longitudinalmovement to the shaft U, carrying with it the clutching member or disk Zand engaging the said clutching member with one or the other of theinteriorly-toothed clutch members ab.

By reference to Figs. 7 and 8 it will be observed that the faces of theteeth a and b are wedge-shaped and that the said wedge or inclined facesof the teeth a bare inclined in opposite directions, so that the sidesof the teeth of the clutching member Z may abut firmly against anabutting-face of the teeth a b, so that the inclined faces of the teetha I) will guide the teeth .2, which are lozengeshaped, into position andwill form a butt or shoulder for the teeth 2 to bear against.

The operation of this form of my invention will be obvious from theforegoing description. I would state, however, that when anyconsiderable motion of the fabric-frame takes place the counterbalancingsprings are stretched or allowed to contract, and as their tensionvaries with their degree of distension such variation must becompensated for, which is performed automatically by the movement of therod U, which brings the clutching member Z of the clutch into engagementwith one or the other of the oppositely-rotating clutch members whichrevolve the shaft U in the nut.

That I claim, and desire to secure by Lettors Patent, is-

1. In an embroideririg-machine, the combination of a fabric-framecombined with means for suspending the same, comprising a plurality ofsuspension'levers, and a longitudinal connectingdinlc between the leversfor effectin g the simultaneous equal movement thereof.

2. In an embroidering-machine, the combination of a fabric-frame, asuspension device therefor comprising a parallel-motion device, a springcounterbalancing device for the parallel-motion device and frame, and acompensating mechanism for automatically controlling the tension of thecounterbalancingspring, as and for the purposes set forth.

3. In an embroidering-machine, the combination of a fabric-frame,counterbalanced supporting devices, vertical links pivoted at both endssuspending the frame from the supporting devices and means fortransmitting motion from one supporting device to the other.

t. 'In an embroiderin g-machine, the combination of a fabric-frame and aparallel-motion supporting mechanism therefor, having all its partspositively connected together, substantially as described.

5. In an embroidering-machine, the combination of a fabric-frame andsuspension mechanism therefor, a spring counterbalancing mechanism forthe said frame and suspension mechanism, and an automatic compensatingdevice for compensating for the irregular tension of the springmechanism at different periods of its stress.

6. In an embroidering-machine, the combination of a fabric-frame, asuspension mechanism, a spring counterbalancing mechanism for thefabric-frame and the suspension mechanism, and an automatic clutchmechanism connected to the spring counterbalancing mechanism duringdifferent periods of its stress.

7. In an embroidering-machine, the combination of a fabricframe, asuspension mechanism therefor, a spring counterbalancing mechanism and arotating compensating device for compensating for the irregularities ofthe spring counterbalancing mechanism during different periods of itsstress.

8. In an embroidering-machine, the combination of a fabric-frame, asuspension mechanism a spring counterbalancing m echanism and acompensating mechanism for the spring counterbalancing mechanismcomprising a plurality of clutch members and a clutching membercooperating with the said clutch members, substantially as described.

9. In an embroidering-machine, the combination of a fabric'frame andsuspension device therefor, and a spring counterbalancing mechanismhaving an automatic spring compensating mechanism therefor, the saidspring counterbalancing mechanism and its compensating mechanism beingpivotally connected to the frame of the embroideringmachine,substantially as described.

10. In an embroidering-machine, the combination of a fabric-frame, asuspension mechanism therefor, a spring counterbalaneing mechanism andan automatic compensating mechanism therefor, the said springcounterbalancing mechanism and compensating mechanism being connected tothe embroidering-machine frame so as to move together, substantially asdescribed.

11. The combination of a spring counter balancing or tension member, ashaft against which the said spring exerts its tension, a nut or bearingupon the said shaft, and means for rotating the said shaft whereby thedifferences of tension of the spring under different de grees of stressmay be compensated for.

12. The combination of springs, a shaft against which the springs exerttheir tension, a shiftable connection on the said shaft for receivingthe thrust of the springs, a clutch device, and a clutching devicemounted upon the shaft and adapted for engagement with the clutchdevice.

13. The combination of a spring or tension member, alongitudinally-movable shaft receiving the thrust of the said tensionmember, a movable bearing on the shaft receiving the thrustof the shaft,and means for rotating the said shaft to movethe bearing thereon so asto compensate for-inequalities in the tension of the spring duringdistension thereof.

14. The combination of a spring member, a shaft, a bearing or nut Xcarried upon the said shaft, a rotating clutch member hung upon theshaft, and a clutching member mounted upon the shaft and adapted forengagement with the clutch member whereby the variations of the tensionof the springs duringlongitudinal movements of the shaft may becompensated for.

15. The combination with tension mechanism and a shaft, of a pluralityof oppositelyplaced clutch members provided with teeth, and aclutchingdevice provided peripherally with projecting teeth adapted forengagement with the teeth of the clutch members, the faces of the teethof the clutch members being oppositely beveled and the teeth of theclutching member being pointed, substantially as described.

16. A parallel-motion device for fabricframe of an embroidering-machine,consisting of a plurality of elbow-levers, a longitudinal linkconnecting the levers for elfecting the simultaneous movement thereof,and suspension-links connecting the free arms of the elbow-levers to thefabric-frame.

17. A parallel-motion device, fabric-frame of an embroidering-machineand suspensionlinks pivoted at both ends for connecting the fabric-frameto the parallel-motion device.

18. A parallel -motion device for fabricframe of embroidering-machine,consisting of a plurality of elbow-levers, a longitudinal link forconnecting said levers for effecting their simultaneous movement andmeans for connecting the free arms of the elbow-levers to thefabric-frame.

JOSEPH A. GROEBLI.

lVitnesses:

M. MoELLIGoTT, MAURIoE BLOCK.

